I am using the Gs RichCopy 360 Enterprise version and was able to move all my 2TB of my valuable files from one external hard drive to another one without any problems at all.
And unlike the window built-in in copy, which always gives you error messages, Gs Richcopy 360 gives no error messages and is very reliable, smooth, simple to use, and speedy. The software is really great for me and is now my all-time favorite software, and worth every single penny.